Photographic lens of the partial focusing type

Details Photographic lens of the partial focusing type Photographic lens of the partial focusing type

1982-12-10

1984-10-16

Corbin, John K.

350432, 350428, G02B 934

Patent

active

044771550

ABSTRACT:
A photographic lens having four components of characteristic forms with the 1st component counting from front being axially moved forward while the 2nd component is moved axially in a given relation to the 1st component as focusing is effected down to shorter object distances.

REFERENCES:
patent: 4124276 (1978-11-01), Okano et al.
patent: 4413888 (1983-11-01), Sato

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